My daughter has been on Zantac and her doc recently added Prevacid. When I went to get the Prevacid I also asked for a refill on Zantac. The pharmacist said, "Why?". I explained that my daughter, obvioulsy, was out of it. She replied, "You want her to take Zantac and Prevacid?". The pharmacist argued with me and wasn't going to give me both. Basically, she was trying to give me one or the other, because she believed my daughter didn't need both. It's hard not to completely lose your cool. I finally said, "Well, she has a DOCTOR that believes she needs both.!".